So a mile has 5280 feet.
21,129/5280= 4 mph
multiply
4 x 2 = 8 miles in 2 hours
the total speed hour is 115
Answer:
4877 fish
Step-by-step explanation:
Each year, the fish population is multiplied by 1-6% = 0.94, so after 8 years it has been multiplied by 0.94^8 ≈ 0.609569.
At that time, the population is ...
8000×0.609569 ≈ 4877 . . . fish
Answer:
Hello,
Step-by-step explanation:
0 girls and 8 boys :
![\left(\begin{array}{c}10\\ 8\end{array}\right)=10*9*8*7*6*5*4*3/8!=45\\\\](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C%208%5Cend%7Barray%7D%5Cright%29%3D10%2A9%2A8%2A7%2A6%2A5%2A4%2A3%2F8%21%3D45%5C%5C%5C%5C)
1 girl and 7 boys:
![\left(\begin{array}{c}6\\ 1\end{array}\right)*\left(\begin{array}{c}10\\7\end{array}\right)=6*10*9*...*4/7!=6*120=720\\\\](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D6%5C%5C%201%5Cend%7Barray%7D%5Cright%29%2A%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C7%5Cend%7Barray%7D%5Cright%29%3D6%2A10%2A9%2A...%2A4%2F7%21%3D6%2A120%3D720%5C%5C%5C%5C)
2 girl and 6 boys:
![\left(\begin{array}{c}6\\ 2\end{array}\right)*\left(\begin{array}{c}10\\6\end{array}\right)=60*210=1260\\](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D6%5C%5C%202%5Cend%7Barray%7D%5Cright%29%2A%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C6%5Cend%7Barray%7D%5Cright%29%3D60%2A210%3D1260%5C%5C)
3 girl and 5 boys:
![\left(\begin{array}{c}6\\ 3\end{array}\right)*\left(\begin{array}{c}10\\5\end{array}\right)\\](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D6%5C%5C%203%5Cend%7Barray%7D%5Cright%29%2A%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C5%5Cend%7Barray%7D%5Cright%29%5C%5C)
4 girls and 4 boys:
![\left(\begin{array}{c}6\\ 4\end{array}\right)*\left(\begin{array}{c}10\\4\end{array}\right)](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D6%5C%5C%204%5Cend%7Barray%7D%5Cright%29%2A%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C4%5Cend%7Barray%7D%5Cright%29)
5 girls and 3 bys:
![\left(\begin{array}{c}6\\ 5\end{array}\right)*\left(\begin{array}{c}10\\3\end{array}\right)](https://tex.z-dn.net/?f=%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D6%5C%5C%205%5Cend%7Barray%7D%5Cright%29%2A%5Cleft%28%5Cbegin%7Barray%7D%7Bc%7D10%5C%5C3%5Cend%7Barray%7D%5Cright%29)
I let you to calculate and make the sum.
Answer:
Step-by-step explanation:
equal to 375 days.